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Bass Boxes

January 26th, 2009 admin

Does putting sponge in the speaker box surrounding the walls in the box make the bass sounds better?

I'm thinking of buying sponges and put it in my speaker box to make my micro hi-fi bass sound better and less distortion... My friend did that to his system (which is a bigger one) and the bass sounds deeper and richer... But i wonder does it works in a small system like mine... Any suggestions?
Is polyfill cotton woo?

Not sponges - poly-fil.

Pollyfil is a sound absorption, dampening fiber that will deepen bass, provide cleaner midrange, tone down any unwanted reverberation and improve the dynamic extension of any speaker system.

It also helps eliminate standing waves, which is something like an echo inside the box. This will give you tighter and more accurate bass. It also helps to give a flatter frequency response to the overall sound, which is good. Besides this, it also helps reduce the vibration of the box, which results in less distortion. There is a big difference to the bass when you have an insulated box.

Damping also increases subwoofer efficiency by dissipating some energy that affects the sub, particularly the voice coil. It is advisable to put damping material inside a box. Pillow polyfill and fiberglass insulation are common, though polyfill is a lot easier on your skin. Polyfill also "tricks" a sub into thinking it is in a bigger box. Most sealed and vented enclosures require 1/2 lb. of dampening material per cubic foot of internal enclosure space. For best results it is recommended to loosely fill the material throughout the enclosure.

It can be found at Wal-Mart in the craft section. It's the same stuff used for pillows or quilts. Sometimes called batting.

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